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High-piezoelectric coefficient potassium-sodium niobate based leadless piezoelectric ceramics and preparation method thereof
The invention relates to high-piezoelectric coefficient potassium-sodium niobate based leadless piezoelectric ceramics and a preparation method thereof. The raw material composition of the high-piezoelectric coefficient potassium-sodium niobate based leadless piezoelectric ceramics is (1-a)(K0.5Na0.5)-.95Li0.05Nb0.93Sb0.07-aMZrO3, wherein M is Ca, Sr or Ba, and a is within the range of 0.01 to 0.06; the following three-step sintering solid-phase synthesis preparation method is adopted: in the first step, the sintering temperature is within the range of 1100-1120 DEG C and the heat preservation time is 0 minute; in the second step, the sintering temperature is within the range of 1160-1210 DEG C and the heat preservation time is 0-5 minutes; in the third step, the sintering temperature is within the range of 1000-1100 DEG C and the heat preservation time is 2-20 minutes; consequently, a novel leadless piezoelectric ceramic material can be obtained, and the maximum piezoelectric coefficient d33 of the material is 410pC/N, wherein d*33 is 450. The leadless piezoelectric ceramic material is applied to a plurality of fields such as ultrasonic transducers, piezoelectric buzzers, drivers and resonators.
High-piezoelectric coefficient potassium-sodium niobate based leadless piezoelectric ceramics and preparation method thereof
The invention relates to high-piezoelectric coefficient potassium-sodium niobate based leadless piezoelectric ceramics and a preparation method thereof. The raw material composition of the high-piezoelectric coefficient potassium-sodium niobate based leadless piezoelectric ceramics is (1-a)(K0.5Na0.5)-.95Li0.05Nb0.93Sb0.07-aMZrO3, wherein M is Ca, Sr or Ba, and a is within the range of 0.01 to 0.06; the following three-step sintering solid-phase synthesis preparation method is adopted: in the first step, the sintering temperature is within the range of 1100-1120 DEG C and the heat preservation time is 0 minute; in the second step, the sintering temperature is within the range of 1160-1210 DEG C and the heat preservation time is 0-5 minutes; in the third step, the sintering temperature is within the range of 1000-1100 DEG C and the heat preservation time is 2-20 minutes; consequently, a novel leadless piezoelectric ceramic material can be obtained, and the maximum piezoelectric coefficient d33 of the material is 410pC/N, wherein d*33 is 450. The leadless piezoelectric ceramic material is applied to a plurality of fields such as ultrasonic transducers, piezoelectric buzzers, drivers and resonators.
High-piezoelectric coefficient potassium-sodium niobate based leadless piezoelectric ceramics and preparation method thereof
ZHAI JIWEI (author) / ZHANG YANG (author) / SHEN BO (author)
2015-09-02
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Potassium-sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
| European Patent Office | 2022
Potassium-sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
| European Patent Office | 2022
Potassium-sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
| European Patent Office | 2022
Potassium-sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
| European Patent Office | 2021